Iron-catalyzed carbonylation–arylation of N-arylacrylamides for synthesis of oxindole derivatives
摘要:
An efficient method for oxindole synthesis is established by iron-catalyzed carbonylation-arylation of N-arylacrylamides with aldehydes. 3-Functionalized oxindoles are synthesized smoothly using FeCl3 as catalyst and TBHP as oxidant. The obtained oxindoles can be used for further transformations to give diverse indole alkaloid structure motifs. (C) 2013 Elsevier Ltd. All rights reserved.
A novel method for the mild photoredox‐mediated tandem radical acylarylation and tandem acylation/semipinacol rearrangement has been developed. The synthesis of highly functionalized ketones bearing all‐carbon α‐ or β‐quaternary centers has been achieved using easily available symmetric aromatic carboxylic anhydrides as the acyl radical source. The method allows for a straightforward introduction of
Simple and abundant carboxylic acids have been used as acyl radical precursor by means of visible‐light photoredoxcatalysis. By the transient generation of a reactive anhydride intermediate, this redox‐neutral approach offers a mild and rapid entry to high‐value heterocyclic compounds without the need of UV irradiation, high temperature, high CO pressure, tin reagents, or peroxides.
Nickel/Photo-Cocatalyzed Asymmetric Acyl-Carbamoylation of Alkenes
作者:Pei Fan、Yun Lan、Chang Zhang、Chuan Wang
DOI:10.1021/jacs.9b12554
日期:2020.2.5
of pendant alkenes tethered on aryl carbamic chlorides with both aliphatic and aromatic aldehydes has been developed via the cooperative catalysis of a chiral nickel-PHOX complex and tetrabutylammonium deca-tungstate. This reaction represents the first example of merging hydrogen-atom-transfer photochemistry and asymmetric transition metal catalysis in difunctionalization of alkenes. Using this protocol
Photocatalyst-free hypervalent iodine reagent catalyzed decarboxylative acylarylation of acrylamides with α-oxocarboxylic acids driven by visible-light irradiation
作者:Wangqin Ji、Hui Tan、Min Wang、Pinhua Li、Lei Wang
DOI:10.1039/c5cc08253f
日期:——
A hypervalent iodine (III) reagent catalyzed carbonylarylation of acrylamides with [small alpha]-oxocarboxylic acids driven by visible-light without photoredox catalyst has been developed. The reactions generate the corresponding products in good yields...
Metal-free oxidative tandem coupling of activated alkenes with carbonyl C(sp2)–H bonds and aryl C(sp2)–H bonds using TBHP
作者:Ming-Bo Zhou、Ren-Jie Song、Xuan-Hui Ouyang、Yu Liu、Wen-Ting Wei、Guo-Bo Deng、Jin-Heng Li
DOI:10.1039/c3sc50810b
日期:——
A metal-free oxidative tandem coupling of activatedalkenes with carbonyl C(sp2)–H bonds and arylC(sp2)–H bonds using TBHP is established for the synthesis of 3-(2-oxoethyl)indolin-2-ones. This method allows 1,2-difunctionalization of the C–C double bond in N-arylacrylamides by simultaneous formation of two C(sp2)–C(sp3) bonds.